To be fair I don't think the long term Tesla market is in the US. The rest of the world tax their vehicles and fuel to the max and we in the US will continue to drive cheap SUV and truck with cheap gasoline. The problem with valuing Tesla as Ford is they are completely different. Ford customers aren't interested in a Tesla and the other way is true. Then you also have the legacy union, factories, domain knowledges, economy of scale, and customer base (one wants power for value the other wants technologies for value).
When you have a new player enter the market it is natural for the existing player to lose market share percentage, that's just math. I don't think it make sense for Ford to abandon their own platform to make new EV but Tesla is starting from scratch so they can do all sorts of things like gigacast and new platform. Just the same as Mazda being a smaller company they can use a different platform than larger companies, and focus on a different segments.
I would say Elon is probably the only person who has the charisma and strong will to get Tesla where it is today. Imagine if Jeff Bezos were running Tesla it would probably be a Wu-Ling whatever in China: cheap, low tech, penalty box, making lots of profit but disposable rental fleet. Think Kindle Fire tablet full of bloatware nobody cares about, but a car.
If you want good return and low risk you should invest in Amazon or Walmart instead of Tesla. If you invest in Tesla don't look at the quarter to quarter profit and compare it to Walmart or Amazon. The Chinese would likely be a bigger threat to Tesla than Ford.